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Questions in physics

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] The power of the kettle was 2.6 kW. The kettle took 120 seconds to heat 0.80 kg of water from 18 °C to 100 °C. Calculate the specific heat capacity of water using this information. Give your answer to 2 significant figures.

[Homework Help] A sample of water with a mass of 123.00 kg is heated from 25 C to 97 C. If the specific heat of water is [tex]$1 J-1 kg K -1$[/tex] then how much energy is required? A. 11.93 kJ B. 123.00 kJ C. 15.01 kJ D. 8.86 kJ

[Homework Help] The primary factor in decreasing the Kinetic Energy of an object is to: A. Decrease the stopping distance B. Decrease the mass C. Decrease the velocity D. Decrease the direction

[Homework Help] In a scenario where a thin metallic strip on a vernier caliper descends from the upper edge to the lower edge and makes constant contact with the surface of a beaker, the main scale displays a reading of 6.40 mm with a vernier constant of 1.1 mm, and the fourth vernier scale division aligns precisely with a main scale division. Determine the precise depth of the beaker, assuming there is no zero error.

[Homework Help] An aluminum block of mass 12.00 kg is heated from 20 C to 118 C. If the specific heat of aluminum is $913 J-1 kg K -1$ then how much energy is required? A. 1073.688 kJ B. 64.640 kJ C. 7456.167 kJ D. 10.956 kJ

[Homework Help] What does the wavelength of a wave measure? A. The width of the wave B. The speed of the wave C. The height of the wave D. The number of waves per second

[Homework Help] Given the following: Main scale reading: 6.4 cm Vernier scale reading: [tex]4 \times 0.01 cm=0.04 cm[/tex] Vernier constant = 0.1 mm [tex]\begin{aligned} \text { TS } & =\text { MSR }+ \text { USR } \\ \text { TS } & =0.04 cm+6.4 cm \times \\ \text { TS } & =6.4 cm+0.04 \times 0.1 \\ & =6.4 cm+ \end{aligned}[/tex] What is the precise depth of the beaker, assuming there is no zero error?

[Homework Help] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Homework Help] Which statement best describes how waves carry energy? A. Energy moves from one place to another through the wave. B. Energy increases as it moves through the wave. C. Energy is completely consumed by the beginning of the wave. D. Energy builds through the wave and is released at the end.